DODGE RAM SRT-10 2006 Service Repair Manual

4.BOOST PRESSURE SENSOR
Using the scan tool, read the boost pressure sensor value.
Is the Boost pressure sensor reading consistent with the barometric pressure for the geographic
region?
Ye s>>
Go To 5
No>>
Relace the Boost pressure sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE- DIAGNOSIS
AND TESTING)
5.INTERMITTENT CONDITION
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specifictothiscircuit.
Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
Were there any problems found?
Ye s>>
Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE- DIAGNOSIS
AND TESTING)
No>>
Te s t C o m p l e t e .

P0071-INLET AIR TEMP SENSOR RATIONALITY
For a complete wiring diagramRefer to Section 8W.

When Monitored:
While the engine is running.
Set Condition:
The ECM does not read a change in value from the sensor over time.
Possible Causes
INLET AIR TEMPERATURE SENSOR
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.INLET AIR TEMPERATURE SENSOR
Remove the temperature sensor and reconnect the wiring to the sensor.
With the scan tool in Sensors, Monitor the inlet Air Temperature.
While heating the sensor with an external heat source (DO NOT USE OPEN FLAME).
Does the reading from the sensor increase at least 5 degrees F. on the scan tool?
Ye s>>
Refer to the INTERMITTENT CONDITIONSymptom (Diagnostic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE- DIAGNOSIS
AND TESTING)
No>>
Replace the inlet air temperature sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE- DIAGNOSIS
AND TESTING)

P0072-INLET AIR TEMP SENSOR VOLTAGE TOO LOW
For a complete wiring diagramRefer to Section 8W.

When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The circuit voltage to the ECM falls below a calibrated threshold for a certain period of time.
Possible Causes
SENSOR OUT OF SPEC
HARNESS SHORTED (SENSOR SIDE)
(K668) 5-VOLT SUPPLY OPEN
HARNESS SHORTED (ECM SIDE)
INTERMITTENT CONDITION
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.INLET AIR TEMP SENSOR OUT OF SPEC
Turn the ignition off.
Disconnect the Inlet Air Temp sensor harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the temperature sensor.
Is the resistance between 300 and 90k ohms?
Ye s>>
Go To 2
No>>
Replace the sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE- DIAGNOSIS
AND TESTING)
2.INTERMITTENT CONDITION
Reconnect the Inlet Air Temp Sensor harness connector.
Turn the ignition on.
With the scan tool, erase DTCs.
With the scan tool, read DTCs.
Did the DTC return?
Ye s>>
Go To 3
No>>
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

3.HARNESS SHORTED (INLET AIR TEMPERATURE SENSOR SIDE)
Turn the ignition off.
Disconnect the inlet Air Temp sensor harness connector.
Disconnect the ECM harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance between the engine ground and the (K615)
temperature sensor signal circuit at the sensor connector.
Istheresistancemorethan100kohms?
Ye s>>
Go To 4
No>>
Repair or replace the Engine harness shorted.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TEST-
ING)
4.HARNESS SHORTED (ECM SIDE)
Measure the resistance between the (K615) signal circuit and all other
circuits at the ECM harness connector.
Istheresistancemorethan100kohms?
Ye s>>
Go To 5
No>>
Repair or replace the ECM harness shorted.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TEST-
ING)

5.(K668) 5-VOLT SUPPLY CIRCUIT
Reconnect the ECM harness connector.
Turn the ignition on.
Measure the voltage between the (K668) supply circuit and the (K690)
return circuit in the Air Temp sensor harness connector.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Go To 6
No>>
Go To 7
6.ECM
Reconnect the Air Temp sensor harness connector.
Reconnect the ECM harness connector.
With the scan tool, erase DTCs.
While monitoring with scan tool, disconnect the Air Temp sensor harness connector.
Did the DTC P0073 set?
Ye s>>
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure) (Referto9-ENGINE-
DIAGNOSIS AND TESTING).
No>>
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE- DIAGNOSIS
AND TESTING)
7.(K668) 5-VOLT SUPPLY OPEN
Disconnect the ECM harness connectors.
Measure the voltage at the (K668) 5-volt supply circuit at the ECM har-
ness connector.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Fix or repair the (K668) 5-volt supply circuit shorted to volt-
age.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TEST-
ING)
No>>
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TEST-
ING)

P0073-INLET AIR TEMP SENSOR VOLTAGE TOO HIGH
For a complete wiring diagramRefer to Section 8W.

When Monitored:
With ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The circuit voltage to the ECM is above a calibrated threshold for a certainperiod of time.
Possible Causes
DTC RETURNS
INLET AIR TEMPERATURE SENSOR
(K615) SIGNAL CIRCUIT OPEN
(K690) RETURN CIRCUIT OPEN
(K615) SIGNAL CIRCUIT SHORTED
INTERMITTENT CONDITION
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.DTC RETURNS
Turn the ignition on.
With the scan tool, erase DTCs.
With the scan tool, read DTCs.
With the scan tool, record all Freeze frame data.
Did the DTC return?
Ye s>>
Go To 2
No>>
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.INLET AIR TEMPERATURE SENSOR
Turn the ignition off.
Disconnect the Inlet Air Temp sensor harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the Inlet Air temp sensor
Is the resistance between 300 and 90k ohms?
Ye s>>
Go To 3
No>>
Replace the Inlet air temperature sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING).

3.RESISTANCE CHECK
Disconnect the ECM harness connector.
Check connectors - Clean/repair as necessary.
Reconnect the Inlet Air Temp sensor harness connector.
Measure the resistance between the (K615) inlet air temperature sensor
signal circuit and (K690) return circuit at the ECM connector.
Is the resistance between 300 and 90k ohms?
Ye s>>
Go To 6
No>>
Go To 4
4.(K615) INLET AIR TEMPERATURE SIGNAL CIRCUIT OPEN
Disconnect the inlet Air Temp sensor harness connector.
Measure the resistance of the (K615) inlet air temperature sensor signal
circuit between the sensor harness connector and the ECM harness
connector.
Is the resistance less than 10 Ohms?
Ye s>>
Go To 5
No>>
Repair or replace the harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)